What if you could be earning a Goldman Sachs-style package while working for a data-focused high speed trading firm-come-systematic hedge fund founded by a former Tudor hedge fund manager which 'loves games', throws Christmas parties on space shuttles, and has 'fiestas' to mark significant occasions in the lives of its employees? Maybe you wouldn't feel so chill.

Sadly for Goldman (and all other banking employees), this alternative exists. It is called 'Two Sigma' and is the high frequency trading firm founded in 2001 by David Siegel (Tudor) and John Overdeck (DE Shaw).

As a privately owned company, Two Sigma doesn't release its results publicly. In the UK, however (where it only employs six people and we guess things might not be so fun), it paid an average of £252k ($379k) a head for the year to 31st December 2013 - the last for which figures are available.

On the whole, Two Sigma's employees seem to like this stuff. - Over on Glassdoor, 92% approve of the CEO and 78% would recommend to a friend. Not everyone's drinking the Kool Aid, however. "It's extremely cliquey," says one disgruntled former employee, who goes on to complain about the "non-stop internal 'Everything is Awesome!' theme."